ASRock H55M/USB3 R2.0 Quick Installation Guide - Page 12

Step 3-3. Carefully place the CPU into the socket by using a purely vertical motion. Step 3-4. Verify that the CPU is within the socket and properly mated to the orient keys. Step 4. Close the socket: Step 4-1. Rotate the load plate onto the IHS. Step 4-2. While pressing down lightly on load plate, engage the load lever. Step 4-3. Secure load lever with load plate tab under retention tab of load lever. 2.2 Installation of CPU Fan and Heatsink For proper installation, please kindly refer to the instruction manuals of your CPU fan and heatsink. Below is an example to illustrate the installation of the heatsink for 1156-Pin CPU. Step 1. Apply thermal interface material onto center of IHS on the socket surface. Step 2. Step 3. Step 4. Place the heatsink onto the socket. Ensure fan cables are oriented on side closest to the CPU fan connector on the motherboard (CPU_FAN1, see page 2, No. 3). Align fasteners with the motherboard throughholes. Rotate the fastener clockwise, then press down on fastener caps with thumb to install and lock. Repeat with remaining fasteners. If you press down the fasteners without rotating them clockwise, the heatsink cannot be secured on the motherboard. Step 5. Connect fan header with the CPU fan connector on the motherboard. Step 6. Secure excess cable with tie-wrap to ensure cable does not interfere with fan operation or contact other components. Please be noticed that this motherboard supports Combo Cooler Option (C.C.O.), which provides the flexible option to adopt two different CPU cooler types, Socket LGA 775 and LGA 1156. The white throughholes are for Socket LGA 1156 CPU fan. 12 ASRock H55M/USB3 Motherboard English